I have a noise when in 2WD, but when I engage the 4WD the noise goes away. It almost sounds like a gear is not quite dis-engaging.

I have an '01 4.0L 4WD XLT with the automatic hubs.

I can't tell if the sound is coming from the left or right.

How can I check to see what is causing it?

Thanks!!!!

 

it is more than likely one of your hubs. i had that problem with my truck before i bought my avm's. raise the front of your truck and spin each wheel by hand and see if you hear it. if not, remove both of the hubs and drive it and see if it goes away